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Proposal of highly effective driving method for linear oscillatory actuator

YINGGANG BU1, MAKOTO KARASAWA1, YUSUKE ISONO1, TSUTOMU MIZUNO1,*

Affiliation

  1. Shinshu University, 4-17-1, Wakasato, 380-8553 Nagano-shi, Japan

Abstract

Linear oscillatory actuators (LOAs) have been widely used in linear compressors as a high-speed oscillatory driving device. Maximum efficiency is obtained at the resonance frequency determined from the spring constant and mass of the mover. However, there is a problem that the efficiency severely decreases when the driving frequency differs from the resonant frequency to change the output power. In this paper, we propose a highly effective driving method in which the thrust, which shows the characteristics of a spring, is generated by the LOA. In the proposed method, the resonance frequency always corresponds to the driving frequency. The efficiency can be improved in a wide range of driving frequency of 20-40 Hz. The efficiency is improved from 6.1 % to 52.2 % at the driving frequency of 40 Hz..

Keywords

Linear motor, Linear oscillatory actuator, Linear compressor, Resonance frequency, Highly efficiency driving method.

Submitted at: March 13, 2008
Accepted at: May 14, 2008

Citation

YINGGANG BU, MAKOTO KARASAWA, YUSUKE ISONO, TSUTOMU MIZUNO, Proposal of highly effective driving method for linear oscillatory actuator, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 5, pp. 1257-1261 (2008)